Pratheesh P Narayanan, third year computer science student of our college has exposed a critical vulnerability in WhatsApp through which an attacker can send the malicious payload to the victim as a contact. The payload is embedded within the contact and no way the victim is aware of it. As soon as the payload gets delivered to the victim,his phone immediately crashes. Pratheesh was rewarded with cash award and his name was added to Facebook Hall of Fame.
Link: click here